Java消息过滤器的实现源码，在EJB 通信过程当中，对方可能给你发来你不想要的信息，就像网上常见的垃圾邮件，EJB 只想得到特定的消息，于是需要一个消息过滤系统-Java message filters to achieve the source, in the EJB communication process, the other party may send you to the information you do not want, just like the online common spam, EJB just want to get a specific message, so the need for a message filtering system